That got me thinking I've never read or come across a fantasy novel that focusses on dwarves. So, if you know any good ones, please reply.

Can't call it a recommendation because I haven't read them but Markus Heitz has a 4 part series called The Dwarves that aught to answer your desire.  Book 1 has a 4 star average from 3 ratings.  The covers are bad ass and I've always wanted to delve into them (you see what I did there?) but just never got around to it.  

As a kid I read Denis McKiernan's Trek to Kraggen-Cor and The Brega Path which are replete with dwarves.  Being a Tolkien fan I was always looking for something like LOTR and I found those books to be derivative of Tolkien but in a way that I liked.  The story, which I don't remember very well, had huge underground battles between dwarves and orcs and seemed to be McKiernan's take on the War of the Dwarves and Orcs that is only hinted at in LOTR and The Silmarillion etc.  It scratched my itch at the time as I recall but I don't know if it would stand up to an adult's scrutiny.